17 Lopez-Granados Lopez-Granados E E Temmerman Temmerman ST ST Wu Wu L L Reynolds Reynolds JC JC Follmann Follmann D D Liu Liu S S Nelson Nelson DL DL Rauch Rauch F F Jain Jain A A Osteopenia in X-linked hyper-IgM syndrome reveals a regulatory role for CD40 ligand in osteoclastogenesis Osteopenia in X-linked hyper-IgM syndrome reveals a regulatory role for CD40 ligand in osteoclastogenesis Proc NatlAcadSci U S A Proc NatlAcadSci U S A 2007 2007 104 104 12 12 5056 5056 61 61. Here, CD40LG is linked to X-linked hyper-IgM syndrome.